A wireless communication network serves wireless User Equipment (UEs) over producer Network Functions (NFs) and consumer NFs that use Network Repository Function (NRFs). The producer NFs determine their NF identities and status. The producer NFs indicate the NF identities and status to the NRFs. The consumer NFs request NF information from the NRFs. The NRFs indicate the NF identities and status to the consumer NFs. The consumer NFs select NF identities based on the NF status. The consumer NFs exchange network signaling with the producer NFs based on the selected NF identities to serve the wireless UEs. The producer NFs may comprise Charging Functions (CHFs).